ABB BAILEY 1746IB16 1746IB32
变频器应用于供水系统，国内外推出的产品均匀为性能较简洁的适用于水泵风机的变频器，众所周知水泵轴功率与转数的三次方成正比例以达到十分有效的节能目的，但变频器的应用还契在着以下一些问题：
生活供水时：
1.变器调频亦不是任意可调，其调频范围在离心泵的特性曲线最佳工作范围内亦就是下调频率10-30%才能显示出最大节能效益，如再往下调频率只会使水泵运转而不出水的工况，亦就是说到了已超出离心泵的极限工作范围了。
2.生活用水在半夜零点以后用水量很小时，水泵在变频器控制下较长时间低频(速)运转对水泵机械工况不利，同时亦耗能，约定额定功率25%目前解决方法一是配小型气压罐，二是在PLC中设延时停泵功能前者增加设备造价后者亦不是最佳方案
3.变频器自身运转过程中会产生电源阶波、噪声、电磁感应、静电感应等特性处理不好会使周围的电器产生误动作，因之有厂商已在产品使用说明书中提出了解决措施。
在消防供水时:
目前国内有近40%的供水设备厂商已经由国家灭火系统检测中心鉴定通过检测标准均为企业标准其控制方式：
①稳压泵变频主泵工频；
②稳压泵工频主泵变频；
③变频全控变频器应用于控制消防其机理。
1.消防管网平时由于渗漏降压故变频控制补压补水，符合节能原理。
2.消防初期火势小、用水量小，为避免浪费水源，能源故变频控制，低频起步火情扩大工频供水。
3.消防主泵功率一般较大，启动时冲击电网故变频软启动。
4.消防管路理想特性曲线最好是流量变化大，压力恒定因此变频控制泵较为合适。
本人愚见以为
1.消防管网渗漏降压是逐步很小的过程，十余年来的使用告诉我们稳压泵启动频率是很底的每月1-2-3次为最多，运转时间亦20-30分钟故对稳压泵变频控制的投资值得商议。
2.根据消防共认火警发生，万众一心分秒必争消灭在萌发期故消防泵配设一用一备一步到位(流量与压力)的措施，变频不适合。
3.较大功率的消防主泵可用星三角或软启动器来解决较之用变频器浪费其它功能且价格、结构、线路更优。
4.变频控制消防推荐应用于湿式自动喷水(雾、细水、混合液等)主泵上较合适因为启动喷淋头(1个喷头流量为1L/S)在“高规”7.6条中举例和国外报导这种自动喷淋在火警中启动灭火是从未有失败过，在1小时灭火有效时间内逐步开启喷淋头适合于变频控制的特性曲线。
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